Fix serialization of datetime objects

pikatasks/settings.py

@@ -35,7 +35,7 @@ WORKER_GRACEFUL_STOP_TIMEOUT = timedelta(seconds=60)
 
 # stuff you probably don't want to touch:
 BLOCKED_CONNECTION_TIMEOUT = timedelta(seconds=20)  # weird stuff to avoid deadlocks, see pika documentation
-DATETIME_FORMAT = "%Y-%m-%dT%H:%M:%S.%f%Z%z"  # serialization, both %Z%z for compatibility in case we ever want to improve timezone-related stuff
+DATETIME_FORMAT = "%Y-%m-%dT%H:%M:%S.%f%z"  # serialization
 DATE_FORMAT = "%Y-%m-%d"  # serialization
 
 

[Art]

Might you enlighten me, what exactly is fixed here? @ahrensde

[Dennis Ahrens]

We had serialization problems when the stuff went live. Our productive environment was unable to deserialize datetime objects properly.

The real fix I did not understand in detail, but you said it is fine. :)